What is the concept of category five wind?

Five winds can make small trees with leaves sway, and there will be small waves on the inland water surface. Category 5 wind, also known as breeze, refers to the wind with a speed of 8.0 to 10.7 meters per second. On land, the five-level wind can make small trees with leaves sway, and there will be waves on the inland water surface, with a height of 2 meters. In the weather forecast, the five-level wind is used to represent the average wind power, and the gust refers to the wind with large and small wind speeds. The wind power at this time refers to the wind power at large time. Wind grade, also known as wind grade, is a way to express wind strength. According to the national standard of wind level and the wind speed at the height of standard meteorological observation station 10 meter released in June, 20 12, the wind level is divided into 18 in turn. There are three commonly used units to express wind speed, namely sea time, meter second and kilometer hour.